JPH042026Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field to Which the Invention Pertains] The present invention relates to an automatic connection/disconnection device for gas-liquid medium pipes for controlling the temperature of a mold of an injection molding machine or the like.

Molds of injection molding machines, etc. have pipes installed in them for supplying a gas-liquid medium to a temperature adjustment mechanism, for supplying pressurized air to a pneumatic operation mechanism, or for connecting a vacuum source to a vacuum circuit. There are many examples of connecting gas or liquid pipes. In this case, these pipes can be automatically connected and separated by automatically or manually attaching both fixed and movable molds to a fixed plate and a movable plate, respectively. A type of connecting pipes was used.

[Prior art]

An example of a conventional automatic pipe connection/disconnection device will be described with reference to FIGS. 3 to 5. A supply side block 13 having a pipe line 12 for supplying a gas-liquid medium is attached to one side of the fixed platen 11 of the injection molding machine, and one side of the pipe line 12 has a large diameter and an O-ring 14 is installed there. is provided. The surface of the supply block 13 on the side where the O-ring 14 is provided is substantially parallel to and coincides with the mold mounting surface of the stationary platen 11. A receiving block 17 having a conduit 16 for receiving gas and liquid medium is attached to one side of the fixed mold 15 attached to the fixed platen 11, and the conduit 16 is located in a straight line with the conduit 12. Also, the supply side block 1 of the receiving side block 17
The surface facing the solid mold 15 is substantially parallel to and coincides with the mounting surface of the solid mold 15.

In the conventional example of such a configuration, FIG. 3 shows the state before the fixed mold 15 is attached to the fixed platen 11, and FIG.
As shown in FIG. 5, the supply side block 13 and the receiving side block 17 come into close contact with each other, and the gas-liquid medium supply conduit 1
2 and the gas-liquid medium receiving conduit 16 are tightly connected by an O-ring 14. Therefore, if gas or liquid is sent to the pipe 12 through the pipe (not shown), the fluid is sent from the pipe 16 to the fixed mold 15 via the pipe (not shown). At this time, the O-ring 14 is fixed within the O-ring groove with an adhesive or the like.

Although it is possible to supply a gas-liquid medium to the mold or to connect the mold to a vacuum source with such a configuration, it is not possible to use a mold in which the mold is moved horizontally on the guide receiver when the mold is unloaded. When using a mold exchange device, there have been many cases in which the O-ring is rubbed and damaged between the fixed mold and the fixed die plate, and between the movable mold and the movable die plate.

[Purpose of invention]

The purpose of this invention is to eliminate these drawbacks, and its purpose is to stably obtain a reliable connection under any conditions, and to eliminate O-rings that occur when the mold is carried in and out of the molding machine in the horizontal direction. It is an object of the present invention to provide an automatic connecting/separating device for a gas-liquid medium pipe line to a mold, which can prevent damage such as the above.

The device of the present invention for automatically connecting/separating a gas/liquid medium pipe to a mold opens one side of the gas/liquid medium supply pipe on a plane substantially parallel to the mold mounting surface of the molding machine, and an O-ring is placed around it. A storage groove is provided, and an O-ring is stored in this groove, and the supply side block is fixed to the mold mounting board, and one side of the gas/liquid medium receiving pipe that can be connected to the gas/liquid medium supply pipe is connected to the molding machine. A receiving side block is provided which has an opening on a plane almost parallel to the mold mounting surface and is fixed to the mold side, and the mold to which the receiving side block is fixed is tightly attached to the mounting surface of the mold mounting board of the molding machine. In an automatic connecting/disconnecting device for a gas-liquid medium pipe to a mold, in which the openings of the supply side block and the receiving side block are tightly connected and the gas-liquid medium can pass through when the mold is fixed, the O of the supply side block is A hole with a bottom is provided at that position of the receiving side block roughly opposite to the ring, and an O-ring is housed in a groove provided on the bottom of the hole, and a hole communicating with the supply conduit in the center and an O-ring of the supply side block are provided. The seal has a diameter slightly larger than the outer diameter of the ring, has a convex shape with elasticity and a low coefficient of friction, and is fitted into a bottomed hole, and from that side of the seal facing the supply side O-ring. It is characterized by a receiving side block consisting of a lid that is attached so that it does not protrude.

[Example of idea]

The present invention will be explained below with reference to FIGS. 1 and 2 showing one embodiment. Note that the same members as those in the conventional example shown in FIGS. 3 to 5 are given the same reference numerals, detailed explanations are omitted, and only the different parts will be explained. A gas-liquid medium supply side block 21 is attached to one side of the fixed platen 11 of the injection molding machine, with its front surface on a plane substantially parallel to the mold mounting surface of the fixed platen 11. A conduit 12 for supplying a gas-liquid medium is provided. A groove 22 for accommodating an O-ring 14 is provided on the front surface of the supply block 21 and on the outer periphery of the conduit 12, and the O-ring is bonded to the bottom of this groove with an adhesive. Further, a gas/liquid medium receiving block 27 is attached to one side of the fixed mold on a plane substantially parallel to the mounting surface of the mold 15 to the injection molding machine, and a gas/liquid medium receiving block 27 is installed approximately in the center of the receiving block 27. A conduit 16 for receiving liquid medium is provided.

This receiving side block 27 is the supplying side block 21.
A Teflon material packing 20 is attached with a lid 19 to the part that is joined when the mold is attached.
An O-ring groove 18 and an O-ring 23 are provided on the receiving side block 27 on the surface that connects this packing with the receiving side block.

Next, the operation of the embodiment described above will be explained. Figure 2 shows the arrow a before the fixed mold 15 is attached to the fixed platen 11.
Fig. 1 shows the state when the mold is carried into the molding machine from the direction.
The figure shows the state after the molding machine has been attached to the molding machine, and the state on the verge of starting to carry it out of the molding machine in the direction of the arrow b. Second
As shown in the figure, at the time of transport, a gap between the fixed mold and the fixed platen is left open for the transport operation, so that the O-ring 14 is never damaged or worn by the receiving block. However, the first
As shown in the figure, when the mold is carried out in the direction of the arrow, the fixed mold 15 and the fixed platen 11 are in close contact with each other and the mold attachment is released, so if you try to carry out the mold in the direction of the arrow, Since the O-ring 14 is rubbed against the surface of the receiving block 27, it is worn and damaged. However, in the present invention, the area of the member that joins with the O-ring 14 is reduced so that only a member made of an elastic material with a small coefficient of friction (such as Teflon) comes into contact with the O-ring. Also, since the surface that contacts the O-ring 14 is made more convex than the lid 19, the O-ring 14 contacts only the gasket 20. Furthermore, in FIG. 2, to explain when the mold is carried in, when the blocks 21 and 27 are separated from each other, the gasket is held by the lid 19, but the elastic force of the O-ring 23 moves it toward the supply side block 21. A gap is formed on the contact surface of the block 21 that has been pushed out, and the O-ring 23 during joining
It is designed to improve sealing performance by having a crushing allowance.

When joined, the contact surfaces between the packing 20 and the block 27 are completely aligned as shown in FIG. 1, and the O-ring prevents gas and liquid from leaking from the contact surfaces.

[Effect of idea]

As explained above, in the device for automatically connecting and separating the gas-liquid medium pipe to the mold according to the present invention, the O-ring that connects and seals the gas-liquid medium supply pipe and the receiving pipe is worn out when the mold is taken out. To prevent damage,
The area of the parts that come into contact with the O-ring has been reduced so that only parts made of elastic materials with a small coefficient of friction come into contact with the O-ring, so when the mold is taken out of the molding machine, the O-ring can be replaced with a steel material. No more damage or wear.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention, Figure 2 is a sectional view of the fixed mold before it is attached to the fixed platen, and Figure 1 is a cross-sectional view of the fixed mold after it is attached to the fixed platen. Cross-sectional views, Figures 3 to 5 show conventional examples, and Figure 3 is a cross-sectional view before the fixed mold is attached to the fixed platen.
FIG. 4 is a sectional view after the fixed mold is attached to the fixed plate, and FIG. 5 is an enlarged view of the O-ring portion. 12... Gas-liquid medium supply pipe line, 14... O-ring, 16... Gas-liquid medium receiving pipe line, 18... O-ring groove, 20... Packing, 21... Supply side block, 22... Groove , 23... O-ring, 27...
…Benefit block.

Claims (1)

[Claim for Utility Model Registration] One side of the gas-liquid medium supply conduit is opened on a plane substantially parallel to the mold mounting surface of the molding machine, and an O-ring storage groove is provided around it, and the O-ring is inserted into this groove. A supply side block that accommodates a supply block and is fixed to the mold mounting board, and one side of a gas-liquid medium receiving pipe connectable to the gas-liquid medium supply pipe is approximately parallel to the mold mounting surface of the molding machine. When a receiving block is provided which has an opening on a parallel plane and is fixed to the mold side, and the mold to which the receiving block is fixed is tightly fixed to the mounting surface of the mold mounting plate of the molding machine, In the automatic connection/disconnection device for a gas-liquid medium pipe to a mold, in which the openings of the supply side block and the receiving side block are tightly connected to allow the gas-liquid medium to pass through, the O-ring of the supply side block is provided with an outline. A hole with a bottom is provided at that position of the opposing receiving side block, and an O-ring is housed in a groove provided on the bottom of the hole, and a hole communicating with the supply conduit in the center and the outside of the O-ring of the supplying side block are installed. A packing having a convex shape having a slightly larger diameter, elasticity, and a small coefficient of friction, and fitted into the bottomed hole, and a packing surface facing the supply side O-ring from that side. An apparatus for automatically connecting and separating a gas-liquid medium pipe to a mold, characterized in that the receiving block is constituted by a lid that is attached so as not to protrude.